Twin drum type continuous casting apparatus and method

A twin drum type continuous casting method for continuously feeding molten metal into a cast portion defined by a pair of water cooling drums that are rotated in opposite directions to each other, thereby continuously casting a plate-like cast piece, by using each drum in which a thin portion is formed close to an outer circumferential portion of each of opposite end portions, in a width direction, of each of said water cooling drums, and a thin annular member having a hot water flow passage therein is formed in between said thin portion and a shaft of each of said water cooling drum with a space between an inner annular surface of each said thin annular member and end face of a respective one of said cooling drums said method comprising the following steps of:

• periodically detecting a difference in thickness between edge portions and a central portion of said plate-like cast piece to be continuously cast;
• if the detected value exceeds a range of a control target value, supplying water to said annular member by decreasing a water temperature;
• and
• if the detected value is smaller than the range of the control target value, supplying water to said annular member by increasing the water temperature.

A twin drum type continuous casting method for continuously feeding molten metal into a cast portion defined by a pair of water cooling drums that are rotated in opposite directions to each other, thereby continuously casting a plate-like cast piece, by using each drum in which a thin portion is formed close to an outer circumferential portion of each of opposite end portions, in a width direction, of each of said water cooling drums, and a thin annular member having a hot water flow passage therein is formed in between said thin portion and a shaft of each of said water cooling drum with a space between an inner annular surface of each said thin annular member and end face of a respective one of said cooling drums said method comprising the following steps of:

• periodically detecting a difference in thickness between edge portions and a central portion of said plate-like cast piece to be continuously cast;
• if a change rate of the detected value exceeds a standard range, supplying water to said annular member by increasing the flow rate of the water;
• and
• if a change rate of the detected value is smaller than the standard range, supplying water to said annular member by decreasing the flow rate of the water.